-LRB- CNN -RRB- -- Gareth Bale has enjoyed an astonishing season -- but the Welsh wing wizard faces a nervous wait to find out whether he will be back in action any time soon .

Tottenham star Bale injured his right ankle while going in for a challenge with Basel 's David Degen on a frustrating night for the home team as it came from two goals down to rescue a 2-2 draw in the first leg of its Europa League quarterfinal .

The 23-year-old has enjoyed an outstanding season , scoring 22 goals in 38 appearances for a Tottenham side chasing a place in next season 's Champions League .

`` It should n't be as bad as it looks on the image , '' manager Andre Villas-Boas told the BBC after still television pictures had shown a painful looking blow .

`` There is a big , big possibility if we stay positive that he will be fit for the Man City game -LRB- on April 21 -RRB- and it will only take him out of two games . ''

`` We still have a big squad and the ability to adapt -LRB- without Bale -RRB- .

`` We just have to play against Everton -LRB- at the weekend -RRB- and see when these players get back to make us even stronger . ''

Bale 's injury capped a frustrating night for Tottenham , which failed to produce the kind of performance its fans had been expected .

Not since 1984 has the club won a European trophy -- on that occasion it defeated Anderlecht over two legs to win the now defunct UEFA Cup .

But any thoughts supporters might have had of reaching the final in Amsterdam were well and truly shattered as Basel started at breakneck speed .

Swiss champion Basel , which knocked Manchester United out of the Champions League in 2011 , grabbed a 30th minute lead when Valentin Stocker fired home from close range after Marco Streller 's effort had hit the post .

With White Hart Lane stunned into silence , Basel took full advantage with Fabian Frei heading home just four minutes later .

Tottenham , currently third in the Premier League , hit back before the break when Emmanuel Adebayor poked home with Gylfi Sigurdsson 's deflected effort ensuring the game finished level .

Across London , Fernando Torres scored twice as Chelsea claimed a 3-1 win over Russian side Rubin Kazan at Stamford Bridge .

The Spain striker , wearing a face mask to protect his broken nose , opened the scoring on 16 minutes before Victor Moses added a second to give Rafael Benitez 's men a measure of control .

Bebras Natcho 's penalty reduced the arrears , but Torres plundered another goal after the break to seal the win .

`` It 's good for his confidence , '' Benitez told ESPN following Torres ' double .

`` His work-rate was really good . I 'm pleased for him . I have said before , he 's training well . It was a question of time .

`` He scored two goals today and hopefully it will be the same in the next game . ''

Elsewhere , Benfica came from a goal down to claim a 3-1 win over Newcastle at Estadio da Luz .

Newcastle grabbed a 12th minute lead through Papiss Cisse and almost extended its advantage further only for the same player 's strike to crash against the post .

Benfica hit back when Rodrigo lashed home from close-range following a mistake by Newcastle goalkeeper Tim Krul .

But the visitor continued to threaten and the post once again denied Cisse much to the frustration of manager Alan Pardew .

That frustration was increased when a defensive error by Davide Santon allowed Lima to fire Benfica in front with 25 minutes remaining before Oscar Cardozo rounded off the scoring from the penalty spot .

`` If we 'd taken 2-1 you 'd like to think we 'd have a fantastic chance but it 's an uphill chance now , '' Pardew told ITV4 .

`` I think the away goal could come into it if we get the first goal -LRB- in the second leg -RRB- . If we can get the first goal we only need one more .

`` They are a quality side and we have to give them respect , but we showed tonight if we are ambitious we can hurt a team . ''

In Turkey , Fenerbahce scored twice in the final 12 minutes to claim a 2-0 win over Italian side Lazio .

Pierre Webo and Dirk Kuyt were both on target for the home side in Istanbul , which proved too strong for a Lazio team forced to play with 10-men after Ogenyi Onazi was shown the red card three minutes after the break .

Meanwhile , Barcelona confirmed it has lodged a formal complaint with UEFA following the performance of German referee Wolfgang Stark during Tuesday 's 2-2 Champions League draw at Paris Saint-Germain .

The La Liga leader was unhappy that the official failed to stop play during the quarterfinal first leg tie while Javier Mascherano and Jordi Alba were both left prostrate following a collision in the penalty area .

`` The club has written to UEFA due to a series of incidents on the pitch in the understanding that objectively speaking it was evident that the referee did not apply the rules of the game , '' Barca spokesman Toni Freixa told a news conference Thursday .

`` When two players from the same team are on the floor the referee should stop the match , which did not happen .

`` What 's more he then obliged them to leave the pitch , in contravention of the rules .

`` An incident that is sufficiently serious in a competition like the Champions League to bring to UEFA 's attention so that it does not happen again . ''

Barca also made public its annoyance at the failure of the officials to rule out Zlatan Ibrahimovic 's strike , which came with the forward in an offside position .

The Swede 's 79th minute effort , which made the score 1-1 , was fiercely contested by the Barcelona players .

`` We are fully conscious of the possibility of errors in refereeing and we do not consider ourselves badly treated , '' Freixa said .

`` But it surprises us that in a high-level competition a referee does not know the rules .

`` We are not judging the work of referees but the basic principle that a judge should know the law . We hope it does not happen again . ''

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Tottenham 's Gareth Bale suffered ankle injury in 2-2 draw with Basel

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Fernando Torres scored twice as Chelsea defeated Rubin Kazan 3-1

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Benfica came from behind to see off Newcastle 3-1 in Lisbon

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Fenerbahce late show ensured 2-0 triumph over Lazio